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Saya membutuhkan rancangan lengkap sistem elektronika untuk sebuah mainan berukuran sedang (100-500 gram) yang bisa melayang. Mekanismenya sederhana: saat tombol push-button OFF, magnet harus saling tarik; saat tombol ON, magnet berubah menjadi saling tolak sehingga mainan terangkat. Lingkup kerja • Merancang driver elektromagnet sesuai konsep “terpisah dari mainan, hanya mainan yang melayang”. • Menentukan komponen, skema rangkaian, dan, bila perlu, layout PCB sederhana—kontroler bebas asalkan mudah didapat dan murah. • Menguji prototipe agar stabil menahan beban mainan di kisaran berat tersebut. • Menyusun estimasi biaya fabrikasi hardware beserta referensi tempat pembuatan (nilai plus jika punya jaringan workshop/PCB house lokal). Referens...

I already have a complete, reviewed schematic for a “Hat”-style board built around the 260-pin MYC-LD25X SoM. What I now need is the full PCB implementation—component placement, high-speed routing, and all deliverables required for manufacturing—in Altium Designer. Project scope • Work from my schematic and libraries (I will supply the Altium project) to create a compact 4-layer board that fits within the maximum outline I will share. • Handle every high-speed interface with controlled-impedance routing: dual Gigabit Ethernet (RTL8211F-CG, RGMII), USB 3.0 Type-C with STUSB1600 + FUSB340, USB2514B USB 2.0 hub, LVDS dual-channel display, MIPI-DSI, and two-lane CSI. • Respect audio best practices around the ES8388 codec—clean analog return p...

أعمل على ابتكار أداة صغيرة (بحجم زر أو إكسسوار يُعلَّق بسهولة) كي تمنح من يصعب عليهم الكلام أو الحركة—مثل الأطفال، كبار السن، المصابين بالشلل، أو الصم-البكم-العُمي—قدرة فورية على طلب المساعدة. الفكرة أن يضغط المستخدم على الجهاز فيرسل إشعاراً لحالات الطوارئ، يُحدد موقعه بدقة، ويصدر صوت إنذارٍ مرتفع يجذب انتباه مَن حوله، إضافة إلى إمكانية بث رسائل نصيّة محددة مسبقاً. ما أحتاجه هو شريك يطوّر لي النموذج الأوّلي كاملاً: الدارة الإلكترونية، البرمجة المدمجة، والتكامل مع وحدة GPS/GSM أو بدائل IoT خفيفة، مع تجربة عملية موثوقة لعمر البطارية وصوت الجرس. سأكون سعيداً باستقبال اقتراحات تصميم الغلاف ونظام التثبيت أيضاً. قبول العمل يرتكز على: • ملف تصميم الدارة (KiCad أو Altium) مع قائمة المكوّنات. • كود المتحكّم (يفضّل ‎C/C++‏ أو ‎MicroPython‎) جاهز للتحميل وا...

I need production-ready PWM firmware for a three-level neutral-point-clamped inverter, built and tested in Simulink, then auto-generated to run on a TMS320F28379D. Reliability is my overriding concern: every carrier cycle must be generated without dropouts, jitter, or pulse misplacement. Precise timing control on the C2000 core is therefore mandatory, so the code has to make disciplined use of the F28379D time-base sub-modules, EPWM trip-zones, and DMA where appropriate. Here is how I picture the workflow and hand-off: • Start from a Simulink model that reproduces the inverter’s three-level space-vector modulation, including dead-time and level-shifting logic. • Configure Embedded Coder so the build flashes straight to the F28379D and can be inspected in Code Composer S...

I’m using the Acebott Smart Car Kit QD001 with the QD007 arm expansion, and I’d like the controls moved from my computer mouse to a dedicated physical remote so my young child can drive and operate the arm without a screen in front of them. I already have the exact remote model selected and ready to pair. What I need is a specialist who can take remote control of my computer, write or adapt the firmware, and map every button to: • Forward, backward, left, right drive functions • Arm up, down, and rotate actions Once you’re in, please handle all code uploads and testing until the car responds smoothly to the remote. When everything works, send me the final, well-commented source code plus a short step-by-step so I can reflash or tweak it later if we add ne...

I want my 2017 Mazda 3 (automatic) to be driven remotely through purely mechanical means. The brief is to design, build, and help me install actuator assemblies that press the gas, squeeze the brakes, and turn the steering wheel with repeatable, fine-grained accuracy—yet leave every wire, sensor, and the ECU completely untouched. Precision at the pedals and wheel is the absolute, non-negotiable priority; a smooth, proportional feel must be indistinguishable from a human driver. The car will be commanded over a robust wireless link that stays solid for roughly 15 km. Dual-band or LoRa, diversity antennas, and hardware failsafes are all on the table as long as the connection behaves flawlessly and drops to a safe-stop state if anything glitches. Scope you will cover • End-to-e...

I am looking for an experienced freelancer to develop a custom Faceit firmware for DMA 75t Card Let me know if you have any questions

I’m building a compact, handheld carbon-monoxide detector for use inside busy industrial plants and I need someone who can take the idea all the way from concept to production files. Your job is to engineer the complete electronics stack—sensor interface, signal-conditioning, microcontroller logic, power management, audible/visual alarms—and turn it into a manufacturable PCB. Core requirements • Target gas: Carbon Monoxide only (expandability to other electrochemical sensors is a plus but not mandatory now). • Operating environment: indoor industrial spaces, so the design must tolerate vibration, electrical noise and a wide temperature / humidity range. • Compliance path: the hardware must be laid out so it can pass ATEX, UL and CE certification. Tha...

Project Overview We are developing a production-oriented V1 Industrial ESP32-S3 based IoT Pulse Controller for self-service car wash and vacuum stations. The device: • Receives secure commands from backend firmware (already under development) • Generates deterministic coin-pulse outputs • Operates in noisy industrial environments (motors, pumps, inductive loads) • Must function reliably in outdoor conditions (temperature variations, humidity) This is V1 Pilot, not mass production yet — but hardware must be stable, clean, and field-ready. ________________________________________ Mechanical & Environmental Requirements • The PCB must fit inside an IP65-rated enclosure • Target environment: o Outdoor installation o Moisture exposure o Temperature range ...

I’m looking for an engineer who can build a full Android-based operating system for a new line of mobile devices. This goes well beyond theming or app-level tweaks—I need the entire stack compiled, optimized and ready to flash on prototype hardware. Here’s the scope in plain terms • Port and configure the latest stable Android source to our device’s chipset (Qualcomm Snapdragon 7-series). • Integrate all required low-level drivers supplied by the hardware vendor—camera, modem, GPU and power management must work flawlessly. • Apply security hardening at kernel and SELinux levels, keeping Google CTS compliance in mind so we can pass certification later on. • Deliver a clean build environment (AOSP + proprietary blobs) and a reproduci...

I need an educational/demo circuit design featuring a 0.625" (15.875mm) circle. Requirements: - 4 sets of SMD resistors connected to a blue LED. - All sets powered and grounded in parallel. - Each Resistor and LED set run in an X shape 5mm outward from the center mounting hole - 5 mounting holes (1mm), arranged as follows: - 1 in the center - 4 at 6.75mm from the center in a + shape - Powered by 5V - Power input via solder point Ideal Skills & Experience: - Experience with SMD components - Circuit design knowledge - Proficiency in working with 5V power systems Extra: I cannot for the life of me figure out how to correctly design a PCB, but the attached picture is my general design if instructions are unclear. I designed it with SMD 1206 (3.2mmx1.6mm) Blue LEDs in mind but ...

Sixteen years of mechanical and software development have brought our motion-control product to a working breadboard built around an ESP32, stepper motors, drivers, encoders, brakes, a LiDAR module and various limit switches. What we now need is an experienced electrical engineer who can transform this proof-of-concept into a reliable, production-ready solution. The immediate scope covers circuit design, PCB layout and the complete wiring/connection strategy. You will take the rough sketches and functional breadboard, validate every signal path, size protective components, place and route the board, and specify harnesses, connectors and test points so that assembly on our factory floor in Bayswater, Victoria is straightforward and repeatable. Because we plan to manufacture at scale, I ne...

I have a Raspberry Pi 5 paired with a HealthyPi 5 HAT on my bench and I want to turn it into a completely offline, voice-driven health companion in the next two weeks. All the hardware is already wired up; I just need solid software engineering to pull the pieces together. Core workflow I’m after • Speech-to-text: run Whisper locally to listen for conversational prompts and, at minimum, “Give me a status update.” • Vitals ingestion: poll HealthyPi’s heart-rate, SpO₂, respiration, temperature and any other available metrics in real time. • Decision layer: generate simple health advice from those vitals (e.g. flagging abnormal ranges) and package it into a friendly sentence. • Text-to-speech: feed that sentence to Piper so the Pi replies a...

I’m looking for an engineer or a small team to deliver a working prototype of the electronics for a automated shutter project. The system runs on 24V DC and drives two brushed DC motors (each actuator delivers roughly 50 Nm at the output shaft through mechanical gearing). The electronics will sit inside the actuator housing, and I want Wi-Fi connectivity with Home Assistant integration (preferably ESPHome, MQTT is also fine). My preference is one ESP32 controlling both motors, with encoders (A/B) on each output shaft. I will not use limit switches, so the design should include reliable end-position handling without them: travel learning/calibration, position tracking via encoders, and safe stopping based on current sensing and/or “PWM commanded but encoder not moving” l...

Description We're developing a battery-powered consumer audio device that plays pre-loaded audio recordings on a daily schedule (three fixed times per day). Audio quality is the #1 technical priority — every design decision (DAC selection, power delivery, speaker driving, trace routing) should prioritize clean, warm, rich audio reproduction. This is Phase 1 — electronics design only. Enclosure design is a separate engagement. Your deliverables are digital design files. We handle fabrication and assembly separately via JLCPCB, so your designs must be production-ready and JLCPCB-optimized. No enclosure work — that's a separate Phase 2 engagement. Device Functionality Plays a 2–3 minute audio recording at three scheduled times daily 3 toggle switches to en...

I'm looking for a small, electronic metronome with the following specifications: - **Form Factor**: Circular (like a 5cm button) or flat (like a credit card). - **Controls**: - Two functions: Adjust volume and cadence using sliders or rotating knobs. - Controls should be quickly accessible without sighting. - On/off activation via single tap. - **Power**: USB-C recharge. - **Portability**: Must fit in a pocket or attach to a sleeve. - **Memory**: Remembers last settings. Ideal skills and experience: - Experience with electronic device design - Proficiency in creating compact, user-friendly interfaces - Knowledge of rechargeable battery integration and memory functions Looking forward to your proposals!

I’m preparing two motivated 7th grade student for an upcoming Robotics Olympiad. They already understand the basics of coding and can assemble and drive a simple robotic car, but they now need a mentor who can take them to the next level. The core of the engagement is hands-on, challenge-driven coaching delivered online (preferred) or in person if you are nearby. Sessions should steadily deepen their knowledge while producing small, demonstrable projects they can refine into a competition-ready solution. Focus areas • Advanced programming techniques (efficient C/C++ for embedded systems) • Sensor integration—ultrasonic, IR, line-tracking, IMU, or similar modules • Working confidently with Arduino Uno and Nano boards using the Arduino IDE If you can wea...

CONFIGURAR LAS CUATRO TECLAS PROGRAMABLES DE LA CONSOLA PARA REALIZAR LAS SIGUIENTES TRAYECTORIAS AL PULSAR CADA UNA DE ELLAS: TECLA PROGRAMABLE 1 (TP1) : CUADRADO INTERIOR TECLA PROGRAMABLE 2 (TP2) : CÍRCULO EXTERIOR AL CUADRADO TP1 TECLA PROGRAMABLE 3 (TP3) : CUADRADO EXTERIOR AL CÍRCULO TP2 TECLA PROGRAMABLE 4 (TP4) : CÍRCULO EXTERIOR AL CUADRADO TP3 SE DEBERA GENERAR EL SIGUIENTE MODELADO, Y CONVERTIRLO Y USARLO COMO HERRAMIENTA: ENTREGA LA ENTREGA SE HARA MEDIANTE 2 FICHEROS: - ESTACION COMPLETA (PACK&GO, *.rspag) - VISOR (*.exe) EL NOMBRE DE LOS FICHEROS DEBERÁ SEGUIR EL SIGUIENTE FORMATO: - ESTACION COMPLETA: - VISOR:

I need someone who can program dwin display, What’s left is the code that brings it to life and links it to an Arduino-based controller here in Thailand. The job covers two tightly-coupled parts: 1. Flashing the DWIN display with my existing pages so that every button, slider, and status field behaves exactly as designed. 2. Writing the Arduino firmware that listens to those commands, drives the motors and other actuators, polls the attached sensors, and feeds live values and alerts back to the screen. All three interface tasks are in scope—motor or actuator control, sensor monitoring, and displaying real-time information and adjustable settings—so the sketch will need a clean, well-documented serial protocol that keeps everything perfectly in sync. You’ll hav...

I want a Raspberry Pi HAT that accepts a single USB-C PD input and breaks it out into three or four downstream USB-C ports that carry both power and data. Each of the three outputs should be able to negotiate its own Power Delivery profile while maintaining a reliable high-speed data link to the Pi (think USB 3 where practical, at least USB 2 if trace lengths make higher speeds unfeasible). Physical limits are the standard HAT outline, with decent thermal relief so the board can handle a fully-loaded 100W input without throttling. I am open to component choices. The outputs range from 20V to 5V. The Pi should get power from the HAT on the I/O pins. Power over Ethernet as a power input would be great but it is not mandatory. If you can tuck in an PoE++ (60W, or even bt for 90W if poss...

I need a turnkey Bluetooth Low Energy control system that lets my staff manage indoor electric drift bikes from an Android tablet. When a rider is ready, the attendant should be able to start or stop a bike over BLE with a single tap; if the link is lost or the preset ride time expires, the bike must shut itself down automatically via an onboard, hard-wired fail-safe timer that works even when the tablet or radio link is unavailable. A physical emergency-stop button on each bike must always override everything. Security is critical: only authorised tablets may connect, commands must be encrypted, and the bikes must default to a powerless, safe state on any fault. The system will run completely offline inside a shopping mall, so no cloud services are allowed. I operate between 11 and 20 b...

I'm looking for an experienced PCB designer to integrate several components for a control system product. The PCB will be powered by DC and should be of medium size. Key components to integrate: - SIM module - PZEM modules - ESP32 - LCD display module Ideal skills and experience: - Proficiency in PCB design software - Experience with integrating multiple modules - Knowledge of DC power systems - Ability to design medium-sized PCBs Please provide examples of past work and relevant experience.

I have the stock MED17.1 binary that runs on the Infineon Tricore TC1796 ( Audi A4 2011 ). My end-goal is simple: add a rolling anti-lag feature to the calibration, triggered only when the cruise-control button is pressed. Here is what I need done: • Disassemble the MED17.1 file in IDA Pro and label the key boost, torque and ignition routines so the logic is repeatable in future versions. • Craft a compact patch—either in Tricore assembly or C inserted via inline assembler—that implements rolling anti-lag. The code must: – Arm only when the cruise-control button bit goes high, – Stay engaged while the button is held and vehicle speed exceeds the set threshold (I will provide the hex address for that flag if needed), – Exit cleanly ...

I’ve completed the physical shell for a phone case with a built-in drawer. I now need a freelancer to design and prototype the **electronics + firmware** that detects drawer activity and reliably sends events to the phone/app which I have already developed. (what I need built): * Recommend the best sensing approach to detect **drawer open/close** (magnetic reed/Hall, microswitch, optical, etc.) and design around the case constraints. * Select components and create a complete electronics design: * **Low-power microcontroller + BLE** (or comparable phone connectivity) * Sensor(s) for drawer state * Battery + charging solution (or wired power if strongly recommended) * LED indicator (subtle, optional but preferred) * Provide: * Schematic, BOM, and PCB layout (compact, manufacturable...

I need to bring up the on-chip EMAC on my NXP board so it can reliably handle data transmission over Ethernet using UDP. The hardware is already powered and running the latest NXP SDK; what’s missing is a clean, well-structured EMAC setup that can move payloads out of RAM and onto the wire with minimal latency and zero packet loss. Scope – Configure and initialise the Ethernet MAC, PHY, clocks, and relevant pins. – Implement a lightweight driver or integrate the SDK’s EMAC layer, exposing simple send/receive buffers. – Provide a concise demo that opens a UDP socket, pushes test data across the link, and echoes incoming packets so I can verify round-trip integrity with Wireshark. Acceptance • Link comes up automatically after reset with a valid...

I need help with a circuit design for a small engine tachometer. Issues with noise and pulse ringing at the moment. If you have experience please let me know

I have a device that runs on 12-48v DC, drawing up to 5A at 12v at bootup. This then settles down to 2-3A for normal operation. I need to run this device from my 12v vehicle battery – either via a cigarette lighter plug or direct battery connection. The device runs fine at 12v, but runs better at a higher voltage. The device’s supplied 240v power supply outputs 30v @ 2.0A/60W. The problem is that when the vehicle engine is started, the current drops and the device reboots. I need a circuit and PCB design that will: a) Be robust enough to live in a vehicle b) Switched (off board) – via screw terminals c) Fused (either on PCB or automotive blade fuse connected to PCB via screw terminals) d) Reverse polarity protection e) Reverse connection protection (i.e. po...

I have an off-road RC platform that I want to turn into a fully autonomous vehicle. The goal is for the car to steer itself, manage throttle and braking, and handle lights/indicators without human input while still allowing me to take over with a transmitter when needed. Here’s what I need from you: • Hardware interface: integrate your preferred control board (Arduino, STM32, Raspberry Pi, or similar) with the existing ESC, steering servo, and LED system. • Software stack: write the embedded code and higher-level logic that handles path-planning, obstacle detection, and failsafe switching back to manual control. • Feature completion: automated steering, speed regulation, and programmable light sequences must all work reliably on rough terrain. Acceptance test 1...

I need a fully-synthesizable VHDL implementation of a single-system GPS L1 C/A receiver that carries the signal all the way from raw I/Q samples through acquisition, tracking, navigation decoding, and a basic PVT solver that delivers standard-accuracy position, velocity, and time. The acquisition stage must use a true parallel-search architecture; serial search or matched-filter alternatives are out of scope for this project. The code has to be cleanly structured, well-commented, and accompanied by self-checking test benches that exercise every major block—acquisition engine, tracking loops (DLL, PLL/FLL), data demodulator, ephemeris parser, and the fixed-point PVT routine. Simulation should run in Vivado or an equally common VHDL simulator, with clear instructions on how to reprodu...

I have a new Segway-style scooter in development and need a seasoned embedded programmer to create the entire self-balancing (gyro/IMU) firmware that will ship on the production boards. The scooter is meant for personal transportation, so reliability, safety and a polished riding feel are non-negotiable. Above all, the control loop must react instantly to rider input—acceleration, braking, tilt corrections—without hunting or lag. I will provide hardware access for bench testing as well as real-world ride data; you will transform that into a finely tuned PID (or equivalent) solution that keeps the deck level and feels natural underfoot. Beyond the core balancing logic, I want a highly customizable interface layer: riders should be able to tweak parameters (speed limits, sensit...

I want to take traditional conveyor-belt tensioning a decisive step forward by creating a completely motorized, cable-and-pulley system that adjusts itself on the fly. The goal is to maintain optimal belt tension at all times—compensating automatically for stretch, wear and changing load—so downtime, manual checks and premature belt failures disappear. My vision centres on a robust mechanical layout married to intelligent control. Integrated real-time tension monitoring, wear-detection sensors and load-variation sensing will feed a compact controller that drives the motorised actuator. Wireless control and monitoring must let operators check status or initiate overrides from a tablet if needed, and the firmware should generate predictive-maintenance alerts long before an issue...

I'm looking for a skilled developer to create MyZmanim, a smart home display device. This device calculates and shows daily religious times based on sunrise and sunset, updating automatically using your location. Key Requirements: - Displays all prayer times - Uses a custom 5-7 inch TFT SPI display with printed casing - Magnets on the back for fridge mounting and a stand for tabletop placement Ideal Skills: - Experience with custom LCD displays & UI - Proficiency in automated time calculation based on geolocation - Knowledge of Arduino IDE code as will be using esp32s

I need a compact, custom gateway that sits between an existing VAX / OpenVMS host (running DECnet Phase IV) and modern Windows-based SCADA software that only understands raw TCP frames. The current middleware is read-only; this replacement must provide full bidirectional READ and WRITE capability so I can both monitor and issue control commands in real time. Key requirements • Hardware: x86-class embedded Linux controller (Debian or Yocto are fine as long as the kernel exposes raw sockets). • Protocol handling: native DECnet Phase IV on one side; raw TCP frames on user-defined port numbers on the other. In addition, it should expose an OPC UA/DA endpoint for external clients that prefer that interface. • Data scope: “Real Time Data monitoring and control” ...

Building a Catholic Prayer Chime Device — Electronics Design Phase We are developing The Angelus Chime, a battery-powered devotional device that plays authentic church bell recordings at 6 AM, 12 PM, and 6 PM. This is Phase 1 focusing exclusively on electronics design. IMPORTANT: This engagement delivers DIGITAL FILES ONLY — No physical prototypes, no assembly, no enclosure work. DEVICE OVERVIEW A sacred object for the home — a device that rings real church bells three times a day, as they have for 700 years across Europe. No app, no WiFi, no Bluetooth. Just bells. CORE FUNCTIONALITY Plays 2-3 minute church bell recordings at prayer times 3 toggle switches for each prayer hour Rotary switch for 8-12 bell recordings on SPI flash Volume control + large mute button Tim...

The goal is to build a proof-of-concept that embeds additional image data inside the JPEG photographs captured by my drones, using the classic Least Significant Bit (LSB) method. Once hidden, the pictures travel through a FANET where each UAV joins a lightweight consensus round to decide which unit forwards the package to the ground station. By the time the file reaches the base, I want to be able to demonstrate that the payload is intact, immutable, and directly traceable to the specific drone that collected it. Core expectations • A clean, well-commented module that hides and later extracts image-based payloads inside JPEG frames via LSB or other types required. • A simple simulation (or lightweight real-world test) showing at least two drones/nodes running a consensus rou...

I’m updating the firmware for an STM32-based design and need an experienced C++ developer who is comfortable inside STM32CubeIDE. The codebase already compiles and runs on the microcontroller, but several features still require clean, well-structured implementation, performance tuning and thorough testing directly on the hardware. You’ll be working exclusively with STM32 microcontrollers; no FPGA or other targets are involved. Please be ready to pull the current CubeIDE project from my repository, build it as-is, and then extend it in C++17 (or later) while respecting the existing HAL layer and project structure. Deliverables • Updated CubeIDE project with the new or fixed functionality fully integrated • Clear build instructions and a short change log so I can ...

Need getting Ionic Fingerprint from Saliva Need the schematic design circuit for this, with its components

I need a compact laser-based device that can track a golf ball in real time, capture its rolling speed frame-by-frame, calculate deceleration, and then switch seamlessly to measure vertical bounce height as well as the ball’s speed just before and after impact with the ground. Rolling speed data is the top priority, yet the bounce metrics are still essential to the overall solution. Because I’ll be moving the unit between an outdoor green and an indoor practice mat, the optics and housing must cope with varying light levels, surface colours, and the occasional speck of sand or moisture. I expect millisecond-level timestamping on all speed and deceleration outputs, delivered either through an onboard display or a simple USB/BLE data stream that I can log to a laptop. Pleas...

1) Project goal Design a single PCB device for testing cable harnesses up to 25 wires, where both ends of the same harness are connected to the board: Side A: 25 lines (A1..A25) Side B: 25 lines (B1..B25) Total: 50 signal lines on the PCB. The detailed test logic (continuity/shorts/mapping) will be implemented in firmware later. For this phase, the key deliverable is robust hardware (schematic + PCB) prepared for such testing. 2) Scope of work (hardware only) Electrical schematic PCB layout Production files: Gerbers + drill BOM (with specs and acceptable alternatives) Assembly files (pick&place/positions) preferred Short mapping table: MCP23017 pins → A/B line numbers (Firmware is NOT required in this phase. Optional “I2C scan / basic blink” is a bonus.) 3...

I need an embedded engineer to help safely connect a PCB to a lead-acid battery pack in series and integrate 4 external sensors (temperature, humidity, water presence, etc.). The system must read data in Arduino IDE and, if possible, send it to an existing telemetry endpoint (HTTP/MQTT). Scope: Safe wiring from battery pack to PCB Best way to connect and mount sensors Connector and grounding recommendations Simple Arduino example to read sensors and output/send data Experience with ESP32, Arduino, sensors, and battery-powered systems required.

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I’m looking for an experienced electronics designer to develop a complete industrial-grade control system consisting of two devices: 1. Transmitter (TX) – collects inputs from joysticks and other signals (8 analog + 2 digital + AUX). 2. Receiver (RX) – receives data from TX via CAN and drives power outputs. Communication between TX and RX must be via CAN bus. The system must operate on 12V or 24V vehicle/machine installations, with a supply range of 9–27V DC. Scope includes schematic design, SMD PCB design, and enclosure selection/design. ⸻ Functional Requirements TX (Transmitter) • 8 analog input channels (joysticks / analog signals) • 2 digital inputs • 1 AUX signal (logic/auxiliary) • Analog measurement must use an industrial-grade ...

I need a purpose-built Wi-Fi modem that can sit in the field, discover and manage between twenty and thirty of my smart prepaid electric meters at once, then forward their information to a third-party server. Core requirements • Meter side: maintain a stable local link to each prepaid electric meter, poll at configurable intervals, queue data when the Wi-Fi link is down, and reconcile immediately after reconnection. • Network side: connect via standard 2.4 GHz Wi-Fi, authenticate securely (WPA2 minimum), and push three distinct data streams—usage statistics, diagnostics snapshots and real-time alerts—through the API endpoints I will supply. • Throughput: normal operating load is small, but latency for real-time alerts must stay below two seconds under fu...

Got it! Here’s a polished and engaging introduction for your blog post that will hook readers right away: Build Your Own DIY RC Car with Arduino – A Step-by-Step Guide Have you ever dreamed of building your own remote-controlled car from scratch? In this guide, we’ll walk you through creating a fully functional DIY RC car using affordable, easy-to-find components like the Arduino Uno, joystick module, NRF24L01 wireless transceiver, and L298N motor driver. Whether you’re a hobbyist, a student, or just someone who loves tinkering with electronics, this project is a fun way to learn about wireless communication, motor control, and Arduino programming. By the end, you’ll not only have a working RC car but also a deeper understanding of how these components work...

Seeking experienced hardware engineer to build a prototype of a wall-mounted emergency device. Specs: Form Factor: Wall-mounted, compact, durable enclosure (weatherproof if outdoor use intended). Primary Function: Transmit pre-programmed GPS coordinates to a central monitoring location (e.g., server, app, or emergency service) upon activation for real-time tracking. Transmission Methods: Primary: GSM (cellular network) for cost-effective, low-latency sending. Failover: Satellite (e.g., Iridium or Globalstar network) if GSM unavailable. Power Source: Battery-powered with optional mini solar panel for recharging. Standby Battery Life: Minimum 1 year without charging (low-power mode). User Interface: Single button for activation; 2 LEDs for status feedback. Key Features Programming: Devic...

My 4.5 V circuit needs a small solar panel and the proper charge-management hardware so daylight tops the battery up automatically. I’m not sure what panel voltage or wattage is best, nor which controller IC will keep the Li-ion safe—so I need your electronics expertise. Scope of work – I'll share my schematic of the existing 4.5v circuit – Select or design a charge-controller stage that handles lithium-ion chemistry, prevents over-charge/over-discharge, and outputs a stable 4.5 V rail to the load. – Provide a clear schematic, concise BOM with part numbers that are easy to source, and wiring instructions I can follow on perfboard or a small PCB. – Advise on any protection components (diodes, fuses, reverse-polarity safeguards) so the device...

Project Description: I'm building a compact, consumer-grade handheld device that hosts multiple ARM processors and modules on a single 4-layer board. The design must accommodate a high-speed USB hub, balanced power distribution, and impeccable signal integrity without exceeding the layer budget. Components to Integrate: Component Details Interface Luckfox Lyra Zero W ARM Cortex-A7 Linux SBC (65×30mm, 40-pin header) Direct solder or socket Teensy 4.1 ARM Cortex-M7 @600MHz audio DSP (61×18mm) 2.54mm headers SL2.1A USB Hub IC 4-port USB 2.0 hub Surface mount XIAO ESP32S3 LoRa module (21×18mm) 1.27mm headers STM32WB55 Module Dual-core ARM Cortex-M4/M0+ (Flipper brain) 8-pin header PyBoard v1.1 ARM Cortex-M4 backup controller 6-pin header GPS Module NEO-6M/8M 4-pin heade...

My setup is an ESP32 wired to a 2.8-inch ILI9341 LCD (I may swap to the 3.2-inch variant; both share the same driver and pinout). All images sit on an SD card; more than fifty of them may be shown . I need a complete MicroPython solution that pulls each JPG straight from the card and pushes it to the display with no intermediate PC-side conversion. Core needs • Initialize the ILI9341 (ST7789) over SPI, handle 320×240 resolution, and work with both display sizes out of the box. • Mount the SD card, scan a folder, and stream-decode each JPG so the ESP32’s RAM footprint stays within limits. • Cycle through every file in the list inside an endless loop; I’ll decide the delay between frames in a simple variable (e.g., DELAY_MS). • Show each image f...

I need a clean, well-commented Arduino sketch for the Pololu 3pi that lets the robot visit six preset locations, interact with the magnet at each spot, and return to its starting line in under four minutes. The only sensing method available is a magnetic sensor array, so all point detection and interaction logic must rely on that hardware. Two run modes have to coexist in the same program and be switchable through a simple flag, jumper, or serial command: • Intermediate – the robot must physically touch the magnet before leaving the point. • Difficult – the robot should recognise the magnetic field, stop just short of contact, and then continue. Between locations, I expect a mix of straight dashes and graceful curves; please handle path planning so the 3pi&r...

Looking for Sound Engineer – Live Voice Transmission Optimization (Hardware + Embedded) I am currently looking for an experienced Sound Engineer / Audio Systems Engineer who is capable of working on live voice transmission from a tablet to standalone hardware such as Raspberry Pi / ESP32-based systems. * The product is already built and functional * The requirement is mainly for optimization, testing, and technical feedback * Focus areas include: audio transmission stability reduction quality optimization –software integration feedback 5.Real-world performance testing This is a great opportunity if you have experience with: * Embedded audio systems * Live streaming audio pipelines * IoT audio hardware * Signal processing for voice transmission If you have worked on similar ...